Lewis hallock nash



L. E. NASH.

Y DISK WATER METER.

(Np Model.)

Patented Oct. 16, 1894.-

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l UNTTEE STATES PATENT @#EETCE.

j `:tEwIs T-IALLOCK NASH, OE souTi-I NORWALK, CONNECTICUT, AssicNoR ToTHE NATIONAL METER COMPANY, OE NEW YORK, N. Y.

` a citizen of the UnitedStates, residing at `DISK WATER-METER.

SPIECIFIGATION forming part of Letters Patent No. 52 7,534, datedOctober`16, 1894. Application mea any 2s. 1,891. serai Nojioafifio. (Nomodel.)

To all whom t may concern:

Be it known that I, LEWIS HALLOCE NASH,

South Norwalk, in the county of Fairfield, in theState of Connecticut,have invented cer-` tain new and useful Improvements in Watertion.

Meters, of which the following is a specificalVIy present inventionconsists of certain novel parts and combinations of parts specilicallypointed out in theclaims concluding this specification.

For the purpose of informing those skilled in the art of the nature ofmy invention, I

have, in the accompanying drawings, shown meters involving my inventionin forms which are at present preferred by me, and

` these drawings, read in connection with the `'following description,will enable such personsto make and use the same; but it will beunderstood that the several features of my invention are not` limited tothe forms and combinations shown, and that Various modiflcations may beadopted without exceeding the scope of the claims.

The following is a description of the structures illustrated in thedrawings.

Figures 1 and 2 are vertical sections through `the measuring chambers oftwo water meters, the dial mechanism and connecting parts being removed,as shown by dotted lines. Fig.

3 is avertical section through a piston.

Similar letters of reference indicate corresponding parts in all thefigures.

Referring to Fig. l, A,B is a meter case of `well-known general form. Cis the shaft through which the motions of the pistonare communicated tothe registering mechanism.

. The `heads and sides of the measuringchamber A, B are preferably,although, so far as some of the novel features of my invention areconcerned, not necessarily, of a non-cor- `rosive metal, as bronze.

`num vitae, vulcanized fiber, &c.

E E are the seats of the ball of the piston, preferably made of anon-metallic material, `as hard rubber, lig- D isa nul tating pistonmade entirely of a non-corrosive metal, l provided with a pin Jconnecting with the registering mechanism through the shaft C. y

Referring to Fig. 2, the case A, B is preferably made of a non-corrosivemetal. The disk of the piston D is made of metal. The exterior I-I ofthe ball of the piston is made of a non metallicmaterial. The interior Fof the ball is made of metal, preferably in one piejce with the disk G.The nonmetallic layer H, if of hard rubber, being thin will be distortedbut little by variations of temperature. Referring to Fig. 3, whichshows a nutating piston without a case, but made to t either of thecases shown in Figs. l andZ, G is the disk` made of metal and O the ballmade of hard rubber in two` parts I and I interlocked and held togetherby a pin P, screw threaded on its lower end to receive a nut Q andhaving a shoulder R toward the other end. The parts I, I embrace theinner rim of the disk G, which abuts against a shoulder S in the ball,by whichit is accurately centered.

Before setting forth in the claims the novel features of my invention,thus distinguishing what is old from what is new, I will briefly`describe some of the advantages possessed by the structures abovedescribed.

The disks of nutating meter pistons heretofore made have beencomparatively fragile and liable to break. By making the disk of metallaltogether avoid difficulty. However, if both piston and case were madeentirely of metal,` the friction and wear occurring `would make thestructure of little or no value as a practical Water meter. As theprincipal friction surfaces are at the ball of the piston and its seatin the case, by making these parts of dierent materials-for instance,one of metal and the other of non-metallic material--the friction andWear `become very slight. Thus the maximum strength and the minimumfriction and wear are obtained and a durable and efficient meter ismade. Such a piston can be used in any suitable case. If the piston, asI prefer to make it, have a disk of metal `and a ball of non-metallicmaterial, it may be used in a case composed of any material ormaterials,for but `little friction and wear will be developed` in theball-bearing, even if the seat in the` case be `of the same or similarnon-metalliclmaterial, as for example, if both be made of hard rubber.

IGO

When the Walls of the case as well as thek disk of the piston are madeof metal, while the kseat and ball are either both of non-me-4 tallicmaterial, or one is of non-metallic material and the other is of metal,the wear on the opposing metallic surfaces, particularly between thespherical walls of the case and the rim of the piston will, other thingsbeing equal, be faster than at the other parts and hence the weight ofthe piston will always be supported on the ball-bearing where frictionis least and friction contact between the edge of the piston and thespherical walls of the case avoided. Besides, by making the ball of thepiston removable, asin Fig. 3, or the seat or seats in the caseremovable, as in Fig. 1, these parts can be easily replaced when wornout, and this irrespective of the materials of which they are made andirrespective of the materials against which they bear.A

In the claims I employ the words co-efcient of abrasion to indicate therapidity with which Wear will take place between opposing surfaces.

In the foregoing specification I have incidentally referred to a few ofthe modifications which may be adopted in practicing my invention, but Ihave not endeavored to specify all the modifications which might beemployed, the object of this specification being to instruct othersskilled in the art to practice the several novel features of myyinvention in forms at present preferred by me and to enable them tounderstand its nature; and I desire it to be distinctly understood thatmention by me of a few modifications is not in any way intended toexclude others not referred to, but which are within the spirit of myinvention.

Many of the combinations and details illustrated and above described arenot essential to the separate features of my invention separately andbroadly considered. All this will be indicated in the concluding claims,as in any given claim the omission of an element, or the omission ofreference to the particular features of the elements mentioned, isintended to be a formal declaration of the fact that the omittedelements or features are not essential to the invention therein covered.

Specific claims on the structures shown in Figs. 1 and 2 are notincluded in this patent as such form the subject matter of two pendingapplications for patents filed ley-Ine November 3, 1893, bearing SerialNos. 489,832 and 489,833. It will, however, be understood that certainclaims of this patent include within their scope both of suchstructures.y

' What I claim is- 1. In a water meter a nutating piston composed fofball and disk combined with a case provided with seats for the pistonball, the disk of the piston and the spherical walls of the case beingcomposed of substances having a larger co-efticient of abrasion than thesubstances composing the ball of the piston and its seats in the case.

, 2. In a water meter, the disk of a nutating piston and the opposingcase walls made of similar materials combined with the ball of saidpiston and the ball bearings in the case made of dissimilar materials.

3. In a Water meter a nutating piston composed of a disk, the exposedsurface o' surfaces of which are metal and a ball the exposed surfacesof which are of non-metallic material combined with a case and seats forthe piston ball.

4. In a water meter, a nutating piston composed of a disk and hall, anexposed surface kof said disk being of metal and said ball being ofnon-metallic material.

5. yIn a water meter, a nutating piston composed of a disk and ball, anexposed surface of said disk being of metal and said ball being ofnon-metallic material, composed of separate parts embracing the innerrim of said disk.

6. In a water meter of the nutating class, the combination of a disk, aball composed of separate pieces embracing the inner edge of said disk,a pin provided with a shoulder and a screw threaded end, and a nutadapted to take on said screw threaded end, by means of which the saidpieces are held together.

7. In a piston of a nutating water meter the combination of a diskcomposed of metal, and a ball composed of non metallic material.

8. Ina Water meter a nutating piston comroo Witnesses:

J. EDGAR BULL, WILLARD JAcoBUs.

